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Suppose f^-1 is the inverse function of a differentiable function f and f(4)=5, f'(4)=2/3. Find (f^-1)'(5).

The first person who gets this correct shall receive 100+ points.

Hint: (f^-1)'(a)=lim as x→a (f^-1(x)-f^-1(a))/(x-a)

Hint 2: (f^-1)(a)=1/f'(f^-1(a))

Hint 3: If f(a)=b then the of f^-1(b)=a

Suppose f^-1 is the inverse function of a differentiable function f and f(4)=5, f'(4)=2/3. Find (f^-1)'(5).

The first person who gets this correct shall receive 100+ points.

Hint: (f^-1)'(a)=lim as x→a (f^-1(x)-f^-1(a))/(x-a)

Hint 2: (f^-1)(a)=1/f'(f^-1(a))

Hint 3: If f(a)=b then the of f^-1(b)=a

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do your own damn homework.

Trust me there are easier ways of getting homework questions.

i know math in arabic

i did take QM in college but i still duno these weird words

i passed finance, QM and Economics with the highest grades in class

but i look at what you wrote and m like what?! +3 :D

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so is one of them right

it was a shot in the dark but i got it

?

That Was hard!

2/3 --→ -3/2

boy would it be funny if i acctually got it right without trying.

**Edit: oh no ^^ is wrong because i did (f-1)(4) not the derivative of it, back to the drawing board!***